202122021012101 has 4 divisors (see below), whose sum is σ = 202277379984204. Its totient is φ = 201966662040000.

The previous prime is 202122021012091. The next prime is 202122021012169. The reversal of 202122021012101 is 101210120221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35719090137025 + 166402930875076 = 5976545^2 + 12899726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202122021012101 is a prime.

It is a super-2 number, since 2×202122021012101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202122021012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122021012701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77679484100 + ... + 77679486701.

It is an arithmetic number, because the mean of its divisors is an integer number (50569344996051).

Almost surely, 2^{202122021012101} is an apocalyptic number.

It is an amenable number.

202122021012101 is a deficient number, since it is larger than the sum of its proper divisors (155358972103).

202122021012101 is a wasteful number, since it uses less digits than its factorization.

202122021012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155358972102.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202122021012101 its reverse (101210120221202), we get a palindrome (303332141233303).

The spelling of 202122021012101 in words is "two hundred two trillion, one hundred twenty-two billion, twenty-one million, twelve thousand, one hundred one".