1200100020122 has 4 divisors (see below), whose sum is σ = 1800150030186. Its totient is φ = 600050010060.

The previous prime is 1200100020103. The next prime is 1200100020139. The reversal of 1200100020122 is 2210200010021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 619228921921 + 580871098201 = 786911^2 + 762149^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300025005029 + ... + 300025005032.

Almost surely, 2^{1200100020122} is an apocalyptic number.

1200100020122 is a deficient number, since it is larger than the sum of its proper divisors (600050010064).

1200100020122 is an equidigital number, since it uses as much as digits as its factorization.

1200100020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600050010063.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200100020122 its reverse (2210200010021), we get a palindrome (3410300030143).

The spelling of 1200100020122 in words is "one trillion, two hundred billion, one hundred million, twenty thousand, one hundred twenty-two".