121021222121001 has 16 divisors (see below), whose sum is σ = 179291809110720. Its totient is φ = 80680315394880.

The previous prime is 121021222120999. The next prime is 121021222121021. The reversal of 121021222121001 is 100121222120121.

121021222121001 is a `hidden beast` number, since 1 + 21 + 0 + 212 + 221 + 210 + 0 + 1 = 666.

It is not a de Polignac number, because 121021222121001 - 2¹ = 121021222120999 is a prime.

It is a super-2 number, since 2×121021222121001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021222121021) 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, 9401520 + ... + 18177761.

It is an arithmetic number, because the mean of its divisors is an integer number (11205738069420).

Almost surely, 2^{121021222121001} is an apocalyptic number.

It is an amenable number.

121021222121001 is a deficient number, since it is larger than the sum of its proper divisors (58270586989719).

121021222121001 is a wasteful number, since it uses less digits than its factorization.

121021222121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27741813 (or 27741807 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121021222121001 its reverse (100121222120121), we get a palindrome (221142444241122).

The spelling of 121021222121001 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one".