1200220209978 has 32 divisors (see below), whose sum is σ = 2459569698432. Its totient is φ = 390223142400.

The previous prime is 1200220209973. The next prime is 1200220210099. The reversal of 1200220209978 is 8799020220021.

It is not an unprimeable number, because it can be changed into a prime (1200220209971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468075 + ... + 1618497.

It is an arithmetic number, because the mean of its divisors is an integer number (76861553076).

Almost surely, 2^{1200220209978} is an apocalyptic number.

1200220209978 is an abundant number, since it is smaller than the sum of its proper divisors (1259349488454).

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

1200220209978 is a wasteful number, since it uses less digits than its factorization.

1200220209978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154710.

The product of its (nonzero) digits is 72576, while the sum is 42.

Adding to 1200220209978 its reverse (8799020220021), we get a palindrome (9999240429999).

The spelling of 1200220209978 in words is "one trillion, two hundred billion, two hundred twenty million, two hundred nine thousand, nine hundred seventy-eight".