1221213020234 has 16 divisors (see below), whose sum is σ = 1929136910400. Its totient is φ = 578197577664.

The previous prime is 1221213020213. The next prime is 1221213020347. The reversal of 1221213020234 is 4320203121221.

It is a super-2 number, since 2×1221213020234² (a number of 25 digits) contains 22 as substring.

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, 7466582 + ... + 7628385.

It is an arithmetic number, because the mean of its divisors is an integer number (120571056900).

Almost surely, 2^{1221213020234} is an apocalyptic number.

1221213020234 is a deficient number, since it is larger than the sum of its proper divisors (707923890166).

1221213020234 is a wasteful number, since it uses less digits than its factorization.

1221213020234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15097117.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1221213020234 its reverse (4320203121221), we get a palindrome (5541416141455).

The spelling of 1221213020234 in words is "one trillion, two hundred twenty-one billion, two hundred thirteen million, twenty thousand, two hundred thirty-four".