1020001200122 has 4 divisors (see below), whose sum is σ = 1530001800186. Its totient is φ = 510000600060.

The previous prime is 1020001200077. The next prime is 1020001200131. The reversal of 1020001200122 is 2210021000201.

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., 661800147121 + 358201053001 = 813511^2 + 598499^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255000300029 + ... + 255000300032.

Almost surely, 2^{1020001200122} is an apocalyptic number.

1020001200122 is a deficient number, since it is larger than the sum of its proper divisors (510000600064).

1020001200122 is an equidigital number, since it uses as much as digits as its factorization.

1020001200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510000600063.

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

Adding to 1020001200122 its reverse (2210021000201), we get a palindrome (3230022200323).

The spelling of 1020001200122 in words is "one trillion, twenty billion, one million, two hundred thousand, one hundred twenty-two".