2121202012101 has 16 divisors (see below), whose sum is σ = 2925986367360. Its totient is φ = 1365282515520.

The previous prime is 2121202012091. The next prime is 2121202012103. The reversal of 2121202012101 is 1012102021212.

It is not a de Polignac number, because 2121202012101 - 2¹⁵ = 2121201979333 is a prime.

It is a super-2 number, since 2×2121202012101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121202012103) 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, 563511 + ... + 2135403.

It is an arithmetic number, because the mean of its divisors is an integer number (182874147960).

Almost surely, 2^{2121202012101} is an apocalyptic number.

It is an amenable number.

2121202012101 is a deficient number, since it is larger than the sum of its proper divisors (804784355259).

2121202012101 is a wasteful number, since it uses less digits than its factorization.

2121202012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587436.

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

Adding to 2121202012101 its reverse (1012102021212), we get a palindrome (3133304033313).

The spelling of 2121202012101 in words is "two trillion, one hundred twenty-one billion, two hundred two million, twelve thousand, one hundred one".