1201021221010 has 64 divisors (see below), whose sum is σ = 2383636413312. Its totient is φ = 432893776896.

The previous prime is 1201021220983. The next prime is 1201021221013. The reversal of 1201021221010 is 101221201021.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1201021221013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9872977 + ... + 9993883.

It is an arithmetic number, because the mean of its divisors is an integer number (37244318958).

Almost surely, 2^{1201021221010} is an apocalyptic number.

1201021221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201021221010 is a deficient number, since it is larger than the sum of its proper divisors (1182615192302).

1201021221010 is a wasteful number, since it uses less digits than its factorization.

1201021221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122747.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201021221010 its reverse (101221201021), we get a palindrome (1302242422031).

The spelling of 1201021221010 in words is "one trillion, two hundred one billion, twenty-one million, two hundred twenty-one thousand, ten".