1022215287420 has 60 divisors (see below), whose sum is σ = 3206727221544. Its totient is φ = 272590742880.

The previous prime is 1022215287409. The next prime is 1022215287479. The reversal of 1022215287420 is 247825122201.

It is a happy number.

1022215287420 is a `hidden beast` number, since 1 + 0 + 2 + 2 + 2 + 152 + 87 + 420 = 666.

1022215287420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 315496926 + ... + 315500165.

Almost surely, 2^{1022215287420} is an apocalyptic number.

1022215287420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022215287420 is an abundant number, since it is smaller than the sum of its proper divisors (2184511934124).

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

1022215287420 is a wasteful number, since it uses less digits than its factorization.

1022215287420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630997112 (or 630997101 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 1022215287420 in words is "one trillion, twenty-two billion, two hundred fifteen million, two hundred eighty-seven thousand, four hundred twenty".