1011212221000 has 64 divisors (see below), whose sum is σ = 2380406071680. Its totient is φ = 402062756800.

The previous prime is 1011212220989. The next prime is 1011212221007. The reversal of 1011212221000 is 1222121101.

It is not an unprimeable number, because it can be changed into a prime (1011212221007) 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, 2860582 + ... + 3194581.

It is an arithmetic number, because the mean of its divisors is an integer number (37193844870).

Almost surely, 2^{1011212221000} is an apocalyptic number.

1011212221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011212221000 is an abundant number, since it is smaller than the sum of its proper divisors (1369193850680).

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

1011212221000 is a wasteful number, since it uses less digits than its factorization.

1011212221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055351 (or 6055337 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1011212221000 its reverse (1222121101), we get a palindrome (1012434342101).

The spelling of 1011212221000 in words is "one trillion, eleven billion, two hundred twelve million, two hundred twenty-one thousand".