20021101212 has 48 divisors (see below), whose sum is σ = 56530172160. Its totient is φ = 5383825152.

The previous prime is 20021101207. The next prime is 20021101237. The reversal of 20021101212 is 21210112002.

It is a super-2 number, since 2×20021101212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7008762 + ... + 7011617.

It is an arithmetic number, because the mean of its divisors is an integer number (1177711920).

Almost surely, 2^20021101212 is an apocalyptic number.

It is an amenable number.

20021101212 is an abundant number, since it is smaller than the sum of its proper divisors (36509070948).

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

20021101212 is a wasteful number, since it uses less digits than its factorization.

20021101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020410 (or 14020408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021101212 its reverse (21210112002), we get a palindrome (41231213214).

The spelling of 20021101212 in words is "twenty billion, twenty-one million, one hundred one thousand, two hundred twelve".