202121021101 has 8 divisors (see below), whose sum is σ = 215149521600. Its totient is φ = 189331575840.

The previous prime is 202121021087. The next prime is 202121021117. The reversal of 202121021101 is 101120121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202121021101 - 2¹³ = 202121012909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121021801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59762065 + ... + 59765446.

It is an arithmetic number, because the mean of its divisors is an integer number (26893690200).

Almost surely, 2^202121021101 is an apocalyptic number.

It is an amenable number.

202121021101 is a deficient number, since it is larger than the sum of its proper divisors (13028500499).

202121021101 is a wasteful number, since it uses less digits than its factorization.

202121021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119527619.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202121021101 its reverse (101120121202), we get a palindrome (303241142303).

The spelling of 202121021101 in words is "two hundred two billion, one hundred twenty-one million, twenty-one thousand, one hundred one".