2121100220102 has 4 divisors (see below), whose sum is σ = 3181650330156. Its totient is φ = 1060550110050.

The previous prime is 2121100220089. The next prime is 2121100220117. The reversal of 2121100220102 is 2010220011212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2121100220102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530275055024 + ... + 530275055027.

It is an arithmetic number, because the mean of its divisors is an integer number (795412582539).

Almost surely, 2^{2121100220102} is an apocalyptic number.

2121100220102 is a deficient number, since it is larger than the sum of its proper divisors (1060550110054).

2121100220102 is a wasteful number, since it uses less digits than its factorization.

2121100220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060550110053.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121100220102 its reverse (2010220011212), we get a palindrome (4131320231314).

The spelling of 2121100220102 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty thousand, one hundred two".