1222400100870 has 192 divisors, whose sum is σ = 3575036424960. Its totient is φ = 298732675968.

The previous prime is 1222400100863. The next prime is 1222400100931. The reversal of 1222400100870 is 780010042221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4251817 + ... + 4530203.

It is an arithmetic number, because the mean of its divisors is an integer number (18619981380).

Almost surely, 2^{1222400100870} is an apocalyptic number.

1222400100870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222400100870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787518212480).

1222400100870 is an abundant number, since it is smaller than the sum of its proper divisors (2352636324090).

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

1222400100870 is a wasteful number, since it uses less digits than its factorization.

1222400100870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278561 (or 278549 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The spelling of 1222400100870 in words is "one trillion, two hundred twenty-two billion, four hundred million, one hundred thousand, eight hundred seventy".