1212210032420 has 24 divisors (see below), whose sum is σ = 2545668541248. Its totient is φ = 484878780000.

The previous prime is 1212210032377. The next prime is 1212210032447. The reversal of 1212210032420 is 242300122121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1212210032392 and 1212210032401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1963835 + ... + 2506205.

It is an arithmetic number, because the mean of its divisors is an integer number (106069522552).

Almost surely, 2^{1212210032420} is an apocalyptic number.

1212210032420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210032420 is an abundant number, since it is smaller than the sum of its proper divisors (1333458508828).

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

1212210032420 is a wasteful number, since it uses less digits than its factorization.

1212210032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654131 (or 654129 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1212210032420 its reverse (242300122121), we get a palindrome (1454510154541).

The spelling of 1212210032420 in words is "one trillion, two hundred twelve billion, two hundred ten million, thirty-two thousand, four hundred twenty".