1022121220212 has 18 divisors (see below), whose sum is σ = 2583695306738. Its totient is φ = 340707073392.

The previous prime is 1022121220207. The next prime is 1022121220273. The reversal of 1022121220212 is 2120221212201.

It is a happy number.

1022121220212 is a `hidden beast` number, since 1 + 0 + 221 + 212 + 20 + 212 = 666.

It can be written as a sum of positive squares in only one way, i.e., 987169422096 + 34951798116 = 993564^2 + 186954^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14196128023 + ... + 14196128094.

Almost surely, 2^{1022121220212} is an apocalyptic number.

1022121220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1022121220212 is an abundant number, since it is smaller than the sum of its proper divisors (1561574086526).

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

1022121220212 is a wasteful number, since it uses less digits than its factorization.

1022121220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28392256127 (or 28392256122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1022121220212 its reverse (2120221212201), we get a palindrome (3142342432413).

The spelling of 1022121220212 in words is "one trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".