102021220121001 has 16 divisors (see below), whose sum is σ = 136415220958080. Its totient is φ = 67820687475200.

The previous prime is 102021220120999. The next prime is 102021220121011. The reversal of 102021220121001 is 100121022120201.

It is a cyclic number.

It is not a de Polignac number, because 102021220121001 - 2¹ = 102021220120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102021220121011) 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, 99500851 + ... + 100520951.

It is an arithmetic number, because the mean of its divisors is an integer number (8525951309880).

Almost surely, 2^{102021220121001} is an apocalyptic number.

It is an amenable number.

102021220121001 is a deficient number, since it is larger than the sum of its proper divisors (34394000837079).

102021220121001 is a wasteful number, since it uses less digits than its factorization.

102021220121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114896.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102021220121001 its reverse (100121022120201), we get a palindrome (202142242241202).

The spelling of 102021220121001 in words is "one hundred two trillion, twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, one".