1021221212010 has 16 divisors (see below), whose sum is σ = 2450930908896. Its totient is φ = 272325656528.

The previous prime is 1021221211981. The next prime is 1021221212041. The reversal of 1021221212010 is 102121221201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17020353504 + ... + 17020353563.

It is an arithmetic number, because the mean of its divisors is an integer number (153183181806).

Almost surely, 2^{1021221212010} is an apocalyptic number.

1021221212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021221212010 is an abundant number, since it is smaller than the sum of its proper divisors (1429709696886).

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

1021221212010 is a wasteful number, since it uses less digits than its factorization.

1021221212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34040707077.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021221212010 its reverse (102121221201), we get a palindrome (1123342433211).

The spelling of 1021221212010 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, ten".