21212011102090 has 16 divisors (see below), whose sum is σ = 38181687723360. Its totient is φ = 8484789387600.

The previous prime is 21212011102063. The next prime is 21212011102091. The reversal of 21212011102090 is 9020111021212.

It is not an unprimeable number, because it can be changed into a prime (21212011102091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5366065 + ... + 8439115.

It is an arithmetic number, because the mean of its divisors is an integer number (2386355482710).

Almost surely, 2^{21212011102090} is an apocalyptic number.

21212011102090 is a deficient number, since it is larger than the sum of its proper divisors (16969676621270).

21212011102090 is a wasteful number, since it uses less digits than its factorization.

21212011102090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763317.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21212011102090 in words is "twenty-one trillion, two hundred twelve billion, eleven million, one hundred two thousand, ninety".