2121012121026 has 32 divisors (see below), whose sum is σ = 4300426021248. Its totient is φ = 697271725440.

The previous prime is 2121012120989. The next prime is 2121012121027. The reversal of 2121012121026 is 6201212101212.

It is a super-2 number, since 2×2121012121026² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121012120993 and 2121012121011.

It is not an unprimeable number, because it can be changed into a prime (2121012121027) 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, 6615315 + ... + 6928521.

It is an arithmetic number, because the mean of its divisors is an integer number (134388313164).

Almost surely, 2^{2121012121026} is an apocalyptic number.

2121012121026 is an abundant number, since it is smaller than the sum of its proper divisors (2179413900222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121012121026 is a wasteful number, since it uses less digits than its factorization.

2121012121026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328746.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 2121012121026 its reverse (6201212101212), we get a palindrome (8322224222238).

The spelling of 2121012121026 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty-one thousand, twenty-six".