202121012021101 has 16 divisors (see below), whose sum is σ = 206477007984000. Its totient is φ = 197808212625408.

The previous prime is 202121012021087. The next prime is 202121012021167. The reversal of 202121012021101 is 101120210121202.

It is a cyclic number.

It is not a de Polignac number, because 202121012021101 - 2⁷ = 202121012020973 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 (202121012001101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7408641 + ... + 21427318.

It is an arithmetic number, because the mean of its divisors is an integer number (12904812999000).

Almost surely, 2^{202121012021101} is an apocalyptic number.

It is an amenable number.

202121012021101 is a deficient number, since it is larger than the sum of its proper divisors (4355995962899).

202121012021101 is a wasteful number, since it uses less digits than its factorization.

202121012021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28836708.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202121012021101 its reverse (101120210121202), we get a palindrome (303241222142303).

The spelling of 202121012021101 in words is "two hundred two trillion, one hundred twenty-one billion, twelve million, twenty-one thousand, one hundred one".