1212747201900 has 1296 divisors, whose sum is σ = 4694667577600. Its totient is φ = 259392430080.

The previous prime is 1212747201877. The next prime is 1212747201959. The reversal of 1212747201900 is 91027472121.

It is a super-2 number, since 2×1212747201900² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 2762521881 + ... + 2762522319.

Almost surely, 2^{1212747201900} is an apocalyptic number.

1212747201900 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 1212747201900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347333788800).

1212747201900 is an abundant number, since it is smaller than the sum of its proper divisors (3481920375700).

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

1212747201900 is a wasteful number, since it uses less digits than its factorization.

1212747201900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 1212747201900 in words is "one trillion, two hundred twelve billion, seven hundred forty-seven million, two hundred one thousand, nine hundred".