1210421253126 has 16 divisors (see below), whose sum is σ = 2420900420400. Its totient is φ = 403464098688.

The previous prime is 1210421253121. The next prime is 1210421253127. The reversal of 1210421253126 is 6213521240121.

It is a super-2 number, since 2×1210421253126² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210421253093 and 1210421253102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210421253121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2138991 + ... + 2645018.

It is an arithmetic number, because the mean of its divisors is an integer number (151306276275).

Almost surely, 2^{1210421253126} is an apocalyptic number.

1210421253126 is an abundant number, since it is smaller than the sum of its proper divisors (1210479167274).

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

1210421253126 is a wasteful number, since it uses less digits than its factorization.

1210421253126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826183.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 1210421253126 its reverse (6213521240121), we get a palindrome (7423942493247).

The spelling of 1210421253126 in words is "one trillion, two hundred ten billion, four hundred twenty-one million, two hundred fifty-three thousand, one hundred twenty-six".