1226101201920 has 1056 divisors, whose sum is σ = 5020001226240. Its totient is φ = 270888468480.

The previous prime is 1226101201889. The next prime is 1226101201937. The reversal of 1226101201920 is 291021016221.

1226101201920 is a `hidden beast` number, since 1 + 2 + 2 + 610 + 1 + 20 + 1 + 9 + 20 = 666.

It is a super-2 number, since 2×1226101201920² (a number of 25 digits) contains 22 as substring.

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, 1511838315 + ... + 1511839125.

It is an arithmetic number, because the mean of its divisors is an integer number (4753789040).

Almost surely, 2^{1226101201920} is an apocalyptic number.

1226101201920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226101201920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510000613120).

1226101201920 is an abundant number, since it is smaller than the sum of its proper divisors (3793900024320).

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

1226101201920 is a wasteful number, since it uses less digits than its factorization.

1226101201920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 1226101201920 in words is "one trillion, two hundred twenty-six billion, one hundred one million, two hundred one thousand, nine hundred twenty".