2121100220212 has 6 divisors (see below), whose sum is σ = 3711925385378. Its totient is φ = 1060550110104.

The previous prime is 2121100220189. The next prime is 2121100220227. The reversal of 2121100220212 is 2120220011212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1489561666576 + 631538553636 = 1220476^2 + 794694^2 .

It is a super-2 number, since 2×2121100220212² (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, 265137527523 + ... + 265137527530.

Almost surely, 2^{2121100220212} is an apocalyptic number.

It is an amenable number.

2121100220212 is a deficient number, since it is larger than the sum of its proper divisors (1590825165166).

2121100220212 is a wasteful number, since it uses less digits than its factorization.

2121100220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530275055057 (or 530275055055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121100220212 its reverse (2120220011212), we get a palindrome (4241320231424).

The spelling of 2121100220212 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty thousand, two hundred twelve".